hi,

I am a newbie, trying to learn struts and hibernate. I am using eclipse IDE with sysdeo tomcat plugin. I have created a small sample web application using struts successfully.I created this using a Tomcat project in Eclipse. I then created another project (this time a java project) in the same eclipse workspace and created a sample hibernate application. Now i wish to integrate the two, i.e. my struts application should talk to the database via hibernate. For this i included the hibernate project in the build path of the struts project and made the call. The code was compiled successfully. However when i try to run the web application, i get a NoClassDefFoundError. I think somehow the path of the hibernate application needs to be set at runtime in the web application. Any idea how this can be done in eclipse?
Any help would be much appreciated. Thanks in advance.

Check few things as follows:-
1) Struts project must have your hibernate project reference under .classpath file
<classpathentry combineaccessrules="false" kind="src" path="/your hibernate project"/>
2) Hiberante project must have all jars under .classpath file
<classpathentry kind="lib" path="/your struts project/WebRoot/WEB-INF/lib/hibernate3.jar"/>

If still you found same problem then please give your exception message with exact noclassfound.

resh123, rajeevkumar,

one thing to note here is that it's NoClassDefFoundError and not Exception, this error is severe than exception the class might be in class path but its not getting loaded under same JVM.

resh123,
make sure that hibernate classes are under WEB-INF/classes or lib folder, try to run whole application without eclipse and see any changes.... some times the java application runs under JVM started by eclipse and not the server you are running.

alternatively you can put all hibernate and struts classes in one jar file ... and if that doesn't helps try adding hibernate class file entry in MANIFEST file of your jar..

Thanks for the response. However it still does not work.
The following is the code in the action class of the struts project:

package minihr.actions;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import testa.TestAccess;
import testa.User;


import org.apache.struts.action.*;

public class LoginAction extends Action{

public ActionForward execute (ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {

boolean success = User.authenticate();
return (mapping.findForward("success"));

}

}
Here, User is a class in the hibernate codebase. Its code is:

package testa;

import org.hibernate.Session;
import util.HibernateUtil;

public class User {

public static boolean authenticate()
{
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
User user = new User();
try
{
session.load(user, "resh");
}
catch (Exception e ) {
System.out.println("User NOT found");
return false;
}
session.getTransaction().commit();
return true;
}
}
Following is the classpath file if the struts project:

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry combineaccessrules="false" kind="src" path="/MiniHRDatabase"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="src" path="WEB-INF/src"/>
<classpathentry output="work" kind="src" path="work"/>
<classpathentry kind="lib" path="WEB-INF/lib/antlr-2.7.2.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/commons-beanutils-1.7.0.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/commons-chain-1.1.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/commons-digester-1.8.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/commons-logging-1.0.4.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/commons-validator-1.3.1.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/oro-2.0.8.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/struts-core-1.3.8.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/struts-taglib-1.3.8.jar"/>
<classpathentry kind="lib" path="WEB-INF/lib/struts-tiles-1.3.8.jar"/>
<classpathentry kind="var" path="TOMCAT_HOME/common/lib/servlet.jar"/>
<classpathentry kind="var" path="TOMCAT_HOME/common/lib/jasper-runtime.jar"/>
<classpathentry exported="true" kind="lib" path="/MiniHRDatabase/bin"/>
<classpathentry kind="output" path="WEB-INF/classes"/>
</classpath>

Following is the classpath file of the hibernate project:

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="lib" path="lib/Access_JDBC30.jar"/>
<classpathentry kind="lib" path="lib/antlr-2.7.6.jar"/>
<classpathentry kind="lib" path="lib/asm.jar"/>
<classpathentry kind="lib" path="lib/asm-attrs.jar"/>
<classpathentry kind="lib" path="lib/cglib-2.1.3.jar"/>
<classpathentry kind="lib" path="lib/commons-collections-2.1.1.jar"/>
<classpathentry kind="lib" path="lib/commons-logging-1.0.4.jar"/>
<classpathentry kind="lib" path="lib/dom4j-1.6.1.jar"/>
<classpathentry kind="lib" path="lib/hibernate.zip"/>
<classpathentry kind="lib" path="lib/hibernate3.jar"/>
<classpathentry kind="lib" path="lib/jdbc2_0-stdext.jar"/>
<classpathentry kind="lib" path="lib/jta.jar"/>
<classpathentry kind="lib" path="lib/log4j-1.2.11.jar"/>
<classpathentry kind="lib" path="lib/xml-apis.jar"/>
<classpathentry kind="lib" path="dtd"/>
<classpathentry kind="output" path="bin"/>
</classpath>

Following is the exception i get:
javax.servlet.ServletException: Servlet execution threw an exception
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
at java.lang.Thread.run(Thread.java:536)


root cause

java.lang.NoClassDefFoundError: org/hibernate/ObjectNotFoundException
at minihr.actions.LoginAction.execute(LoginAction.java:33)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:432)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:386)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:534)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
at java.lang.Thread.run(Thread.java:536)


Please help!

Thanks is advance.

Rohit, thnx for ur reply. Do you mean to say that instead of separate projects, i should place both the hibernate code and the struts code in the same project in eclipse?
I have posted my code and all the details in a reply to rejeevkumar, can you please check it out and let me know if anything looks wrong?
Any help would be much appreciated.

Thanks.

Rohit, thnx for ur reply. Do you mean to say that instead of separate projects, i should place both the hibernate code and the struts code in the same project in eclipse?
I have posted my code and all the details in a reply to rejeevkumar, can you please check it out and let me know if anything looks wrong?
Any help would be much appreciated.

Thanks.

Yes, this is what i mean to say, your code is getting compiles because jar files are available and visible to eclipse, but not to TOMCAT server,
put the hibernate jar file(+ your code) in WEB-INF/lib of server and run the application.

Thanks for the response. It did work :)
I kept the projects separate, however i added jaf file of the hibernate code and jars related to hibernate in the web-inf/lib folder of the struts application.
Thanks once again!

Please rate if it helped... :) Thanks